NetworkManager fails to bring up interface with the error NetworkManager[xxxx]: <error> [1536251528.8348] device (eno1): addrconf6: failed to start neighbor discovery: failure creating libndp socket: Address family not supported by protocol (97)

Solution Verified - Updated -

Issue

  • NetworkManager reports the following error when attempting to initialize an interface when IPv6 is disabled via the grub command line:
NetworkManager[1231]: <error> [1536251528.8348] device (eno1): addrconf6: failed to start neighbor discovery: failure creating libndp socket: Address family not supported by protocol (97)

Environment

  • Red Hat Enterprise Linux (RHEL) 8.5 and older

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